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CHAPTER 4 USING URL ROUTINGvar viewModel = {items: ko.observableArray(["Apple", "Orange", "Banana"]),selectedItem: ko.observable("Apple")};$(document).ready(function() {ko.applyBindings(viewModel);$('div.catSelectors').buttonset();hasher.initialized.add(crossroads.parse, crossroads);hasher.changed.add(crossroads.parse, crossroads);hasher.init();crossroads.addRoute("select/:item:", function(item) {if (!item) {item = "Apple";} else if (viewModel.items.indexOf(item)== -1) {viewModel.items.push(item);$('div.catSelectors').buttonset();}if (viewModel.selectedItem() != item) {viewModel.selectedItem(item);}});crossroads.addRoute("", function() {viewModel.selectedItem("Apple");})$('[data-url]').live("change click", function(e) {var target = $(e.target).attr("data-url");if (e.target.tagName == 'SELECT') {target += $(e.target).children("[selected]").val();}if (location.hash != target) {location.replace(target);}})});92www.it-ebooks.info
CHAPTER 4 USING URL ROUTINGThe selected item is: I have defined another custom binding to correctly set the selected attribute on the appropriateoption element. I called this binding selected (obviously enough), and it is defined, as shown in Listing4-11, in the utils.js file.Listing 4-11. The Selected Data Bindingko.bindingHandlers.selected = {init: function(element, accessor) {if (accessor()) {$(element).siblings("[selected]").removeAttr("selected");$(element).attr("selected", "selected");}},update: function(element, accessor) {93www.it-ebooks.info
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Contents at a Glance• About the A
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CHAPTER 1 GETTING READYWhat Do You
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CHAPTER 1 GETTING READYChapter 8:
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CHAPTER 1 GETTING READYWould you l
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CHAPTER 1 GETTING READYThe server-
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CHAPTER 1 GETTING READYListing 1-3
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CHAPTER 1 GETTING READY{{each prop
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C H A P T E R 2Getting StartedIn th
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CHAPTER 2 GETTING STARTEDListing 2
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CHAPTER 2 GETTING STARTED• Cauti
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CHAPTER 2 GETTING STARTEDIn Listin
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CHAPTER 2 GETTING STARTEDHandling
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CHAPTER 2 GETTING STARTEDFigure 2-
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CHAPTER 2 GETTING STARTED($0)Total
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CHAPTER 2 GETTING STARTED})}$('.la
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CHAPTER 2 GETTING STARTEDOnce agai
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CHAPTER 2 GETTING STARTED...$('spa
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Page 77 and 78: C H A P T E R 4Using URL RoutingIn
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Page 109 and 110: C H A P T E R 5Creating Offline Web
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Page 137 and 138: C H A P T E R 6Storing Data in the
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CHAPTER 6 STORING DATA IN THE BROW
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C H A P T E R 7Creating Responsive
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CHAPTER 7 CREATING RESPONSIVE WEB
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C H A P T E R 8Creating Mobile Web
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CHAPTER 8 CREATING MOBILE WEB APPS
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C H A P T E R 9Writing Better JavaS
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CHAPTER 9 WRITING BETTER JAVASCRIP
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• INDEXHTML5 local storage featur
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• INDEXURL routing, CheeseLux (co
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Pro JavaScript for Web AppsCopyrigh
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Contents• About the Author.......
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• CONTENTS• Chapter 3: Adding a
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• CONTENTSUsing Persistence in th
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• CONTENTSAdding Tests for a Modu
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About the Technical Reviewer RJ Owe
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